Specifications:For use with smaller chip APS-c cameras only
The full frame diagonal field of view produces striking images with exaggerated perspective of near subject & extreme barrel distortion of the surrounding areas
HSM (Hyper-Sonic Motor) ensures a quiet & high-speed auto focus
Super Multi-Layer lens coating reduces flare & ghosting & assures high image quality throughout the entire zoom range
The minimum focusing distance of 5.3 inches & a magnification ratio of 1 to 3.3 allows subjects to be as close as ¾ of an inch from the lenses’ front element
Supplied with a gelatin filter holder at the rear for easy addition of color correction filters

Note that the photo above does not match the lens in question. Also, the written descriptiion above refers to a zoom (?).

Dec 19, 2012

grueber34OfflineImage Upload: Off

Registered: Jan 10, 2011Location: United StatesPosts: 12

Review Date: Dec 12, 2012

Recommend? no |
Price paid: $500.00
| Rating: 4

Pros:

Nice and sharp.

Cons:

Big and heavy.

I really like the results of this lens on my Canon T4i and appreciate the 2.8 aperture. However, due to its disproportionate size and weight, I opt to leave it at home most of the time. It is considerably larger and heavier than the Canon 15/2.8 for full frame, and nearly the same size as the very good Sigma 18-250 Macro. No idea why Sigma needed to design such a formidable thing. Another minor gripe is that due to Canon's 1.6x crop factor, you will not get a 180-degree diagonal view as with Nikon.

Dec 12, 2012

MondOfflineImage Upload: Off

Registered: Jul 6, 2012Location: United KingdomPosts: 26

Review Date: Jul 6, 2012

Recommend? yes |
Price paid: Not Indicated
| Rating: 10

Pros:

Price, build, sharpness

Cons:

Lenscap nearly as big as the lens

Super little lens, sharp right across from corner to corner, fast focus. Great fun when used correctly.

I use it with Nikon DSLRs and post-processing software 'Hemi fisheye' for great results.